Feat(eos_cli_config_gen): Implement next-hop resolution disabled for evpn address-family

[gmuloc]

Change Summary

Model can be challenged - only implementing what is needed for WAN config so skipping vxlan and mpls keywords

ceos2(config-router-bgp-af)#show cli commands | grep next-hop
[...]
[no|default] next-hop mpls resolution ribs ( { system-connected | system-unicast-rib | ( tunnel-rib ( system-tunnel-rib | ( colored system-colored-tunnel-rib ) | TUNNEL_RIB ) ) } )
[no|default] next-hop resolution disabled
[no|default] next-hop vxlan resolution ribs ( system-connected | system-unicast-rib )```

## Component(s) name

`arista.avd.eos_cli_config_gen`

## Proposed changes

      next_hop:
        type: dict
        keys:
          resolution_disabled:
            type: bool

## How to test

molecule

## Checklist


### Repository Checklist

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- [x] My code has been rebased from devel before I start
- [x] I have read the [**CONTRIBUTING**](https://avd.sh/en/latest/docs/contribution/overview.html) document.
- [x] My change requires a change to the documentation and documentation have been updated accordingly.
- [x] I have updated [molecule CI](https://github.com/aristanetworks/ansible-avd/tree/devel/ansible_collections/arista/avd/molecule) testing accordingly. (check the box if not applicable)